Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BD33

ICAO 24-bit transponder address · allocated to Korea, South

Currently assigned to HL7533 · BOEING 777-300

Hex
71BD33
Octal
34336463
Decimal
7,454,003
Country
KR
Tail
HL7533
Type
B773
No current signal · last broadcast 3h ago
Flights observed
86
Distinct callsigns
11
Country
KR
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 71BD33.

Country allocation

The ICAO 24-bit address 71BD33 falls within the block assigned to Korea, South (KR) by ICAO Annex 10, Volume III. Every aircraft registered in Korea, South receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 11 distinct

Callsign Airline Flights Last seen
KAL766 Korean Air 13 2026-05-30
KAL765 Korean Air 13 2026-05-30
KAL624 Korean Air 12 2026-05-29
KAL623 Korean Air 11 2026-05-29
KAL416 Korean Air 10 2026-05-28
KAL621 Korean Air 8 2026-05-28
KAL602 Korean Air 8 2026-05-17
KAL622 Korean Air 7 2026-05-29
KAL601 Korean Air 2 2026-05-27
KAL888 Korean Air 1 2026-05-16
KAL196P Korean Air 1 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 KAL766 CTS → ICN May 30, 06:00 UTCMay 30, 08:40 UTC2h 40m
2026-05-30 KAL765 ICN → CTS May 30, 01:55 UTCMay 30, 03:55 UTC2h 0m
2026-05-29 KAL624 MNL → ICN May 29, 15:55 UTCMay 29, 19:15 UTC3h 20m
2026-05-29 KAL623 ICN → MNL May 29, 10:10 UTCMay 29, 13:25 UTC3h 15m
2026-05-29 KAL622 MNL → ICN May 29, 04:30 UTCMay 29, 07:45 UTC3h 15m
2026-05-28 KAL621 ICN → MNL May 28, 23:05 UTCMay 29, 02:35 UTC3h 30m
2026-05-28 KAL416 GUM → ICN May 28, 01:30 UTCMay 28, 11:50 UTC10h 20m
2026-05-27 KAL601 ICN → CEB May 27, 11:30 UTCMay 27, 21:00 UTC9h 30m
2026-05-27 KAL766 CTS → ICN May 27, 06:04 UTCMay 27, 08:35 UTC2h 31m
2026-05-27 KAL765 ICN → CTS May 27, 02:04 UTCMay 27, 04:14 UTC2h 10m
2026-05-26 KAL416 GUM → ICN May 26, 01:30 UTCMay 26, 11:39 UTC10h 10m
2026-05-25 KAL624 MNL → ICN May 25, 16:20 UTCMay 25, 19:35 UTC3h 15m
2026-05-25 KAL623 ICN → MNL May 25, 10:15 UTCMay 25, 13:30 UTC3h 15m
2026-05-25 KAL622 MNL → ICN May 25, 04:25 UTCMay 25, 07:50 UTC3h 25m
2026-05-25 KAL621 ICN → MNL May 25, 01:55 UTCMay 25, 02:20 UTC25m
2026-05-24 KAL621 ICN → MNL May 24, 23:05 UTCMay 24, 23:30 UTC25m
2026-05-24 KAL416 GUM → ICN May 24, 01:40 UTCMay 24, 11:30 UTC9h 50m
2026-05-23 KAL416 GUM → ICN May 23, 01:30 UTCMay 23, 11:35 UTC10h 5m
2026-05-22 KAL624 MNL → ICN May 22, 16:05 UTCMay 22, 19:15 UTC3h 10m
2026-05-22 KAL623 ICN → MNL May 22, 10:40 UTCMay 22, 14:00 UTC3h 20m
2026-05-22 KAL766 CTS → ICN May 22, 06:10 UTCMay 22, 08:35 UTC2h 25m
2026-05-22 KAL765 ICN → CTS May 22, 02:05 UTCMay 22, 04:30 UTC2h 25m
2026-05-21 KAL624 MNL → ICN May 21, 16:10 UTCMay 21, 19:25 UTC3h 15m
2026-05-21 KAL623 ICN → MNL May 21, 10:45 UTCMay 21, 14:10 UTC3h 25m
2026-05-21 KAL622 MNL → ICN May 21, 04:35 UTCMay 21, 07:55 UTC3h 20m
2026-05-20 KAL621 ICN → MNL May 20, 23:15 UTCMay 21, 02:35 UTC3h 20m
2026-05-20 KAL416 GUM → ICN May 20, 01:30 UTCMay 20, 11:45 UTC10h 16m
2026-05-19 KAL624 MNL → ICN May 19, 15:50 UTCMay 19, 19:00 UTC3h 10m
2026-05-19 KAL623 ICN → MNL May 19, 10:30 UTCMay 19, 14:00 UTC3h 30m
2026-05-19 KAL622 MNL → ICN May 19, 04:35 UTCMay 19, 07:55 UTC3h 20m
2026-05-18 KAL621 ICN → MNL May 18, 23:05 UTCMay 19, 02:25 UTC3h 20m
2026-05-18 KAL416 GUM → ICN May 18, 01:30 UTCMay 18, 11:50 UTC10h 20m
2026-05-17 KAL602 CEB → ICN May 17, 11:25 UTCMay 17, 21:10 UTC9h 45m
2026-05-17 KAL766 CTS → ICN May 17, 06:00 UTCMay 17, 08:20 UTC2h 20m
2026-05-17 KAL765 ICN → CTS May 17, 02:05 UTCMay 17, 04:20 UTC2h 15m
2026-05-16 KAL624 MNL → ICN May 16, 16:50 UTCMay 16, 20:15 UTC3h 25m
2026-05-16 KAL623 ICN → MNL May 16, 10:20 UTCMay 16, 14:20 UTC4h 0m
2026-05-16 KAL888 PVG → ICN May 16, 02:40 UTCMay 16, 07:35 UTC4h 56m
2026-05-15 KAL766 CTS → ICN May 15, 06:20 UTCMay 15, 08:25 UTC2h 5m
2026-05-15 KAL765 ICN → CTS May 15, 02:10 UTCMay 15, 04:45 UTC2h 35m
2026-05-14 KAL602 CEB → ICN May 14, 11:35 UTCMay 14, 21:25 UTC9h 50m
2026-05-14 KAL766 CTS → ICN May 14, 06:10 UTCMay 14, 08:20 UTC2h 10m
2026-05-14 KAL765 ICN → CTS May 14, 02:05 UTCMay 14, 04:30 UTC2h 25m
2026-05-13 KAL601 ICN → CEB May 13, 11:35 UTCMay 13, 21:40 UTC10h 5m
2026-05-13 KAL766 CTS → ICN May 13, 06:15 UTCMay 13, 08:35 UTC2h 20m
2026-05-13 KAL765 ICN → CTS May 13, 01:55 UTCMay 13, 04:10 UTC2h 15m
2026-05-12 KAL602 CEB → ICN May 12, 11:45 UTCMay 12, 21:20 UTC9h 35m
2026-05-12 KAL766 CTS → ICN May 12, 06:10 UTCMay 12, 08:35 UTC2h 25m
2026-05-12 KAL765 ICN → CTS May 12, 02:45 UTCMay 12, 04:15 UTC1h 30m
2026-05-11 KAL416 GUM → ICN May 11, 01:25 UTCMay 11, 11:50 UTC10h 25m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the HL7533 page for operator, model, and routing details .

Mode-S 71BD33 frequently asked

What is Mode-S code 71BD33?
71BD33 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7533.
Where is Mode-S 71BD33 registered?
Mode-S code 71BD33 is allocated to Korea, South (KR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 71BD33 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BD33, octal 34336463, decimal 7,454,003.
What flights does 71BD33 operate?
Mode-S 71BD33 has broadcast 11 distinct callsigns, including KAL766, KAL765, KAL624, KAL623, KAL416.